macronucleus
/ˌmakrəʊˈnjuːklɪəs/Zoology
noun
The larger of the two types of nuclei of ciliate protozoans, responsible for the control of most cellular processes other than sexual reproduction.
Origin
Late 19th century; earliest use found in Journal of the Royal Microscopical Society. From macro- + nucleus.
- keep someone under
- keep someone up
- keep something back
- keep something dark
- keep something down
- keep something from
- keep something in
- keep something quiet (or keep quiet about something)
- keep something to oneself
- keep something under one's hat
- keep something up
- keep step
- keep tabs (or a tab) on
- keep the ball rolling
- keep the bastards honest
- keep the field
- keep the peace
- keep the pot boiling
- keep (the) score
- keep the wolf from the door
- keep time
- keep to
- keep to oneself
- keep up (also keep up with)
- keep up appearances